Perhaps you should try some spelling variations:
cong thanh » dong thanh, cong trinh, cong tan
thanh phan » thanh pho, thanh san, thanh toan
hien danh » thien danh, hien hanh, hien nhanh
thuc hung » thuc chung, thuc nhung, thuc vung
thuc cung » thuc chung, thuc vung, tuc cung
thuc dung » thuoc dung, thuy dung, tuc dung
phan lap » phan dau

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: hoc hien danh - tinh toan ((((thuc hung) OR (thuc cung))) or (thuc dung)) cong thanh phan lap~.
• If you are trying to use Boolean operators, they must be ALL CAPS: hoc hien danh - tinh toan ((((thuc hung) OR (thuc cung))) OR (thuc dung)) cong thanh phan lap.
• The words AND, OR and NOT may confuse the search; try adding quotes: "hoc hien danh - tinh toan ((((thuc hung) OR (thuc cung))) or (thuc dung)) cong thanh phan lap".
• Adding a wildcard symbol may retrieve word variants: hoc hien danh - tinh toan ((((thuc hung) OR (thuc cung))) or (thuc dung)) cong thanh phan lap*.